{
  "manageEntity": {
    "action": "Save",
    "entityId": "260738988",
    "entityType": "Track",
    "nonce": "0xe796caf97e33322089ca53e3da9441fd412cc0946e598c47e2edc45050abc302",
    "signature": "0xeaf97ebf5ca99a0e4cc5cbaa65eac49fe62f575a4d797d08f5d09d6ded0e02c4248f15e03915da0028c22cffe895f43e0837721bc2f44991c21c9e0e61ae43f71b",
    "signer": "0xe5223Dc6E411A24e22DcF917955e97a8D7479d0c",
    "userId": "981716494"
  }
}